US4922356A - Transducer supporting apparatus and disk storage unit - Google Patents

Transducer supporting apparatus and disk storage unit Download PDF

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Publication number
US4922356A
US4922356A US07/008,259 US825987A US4922356A US 4922356 A US4922356 A US 4922356A US 825987 A US825987 A US 825987A US 4922356 A US4922356 A US 4922356A
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United States
Prior art keywords
structural support
flexible
transducer
free end
flexible fingers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/008,259
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English (en)
Inventor
Yuzo Yamaguchi
Yoshinori Takeuchi
Yokuo Saitoh
Hiroshi Daito
Hiroyasu Nakajima
Yoshiakira Karakama
Yukimori Umakoshi
Kazunori Hori
Mikio Tokuyama
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HGST Japan Ltd
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Hitachi Ltd
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Assigned to HITACHI, LTD. reassignment HITACHI, LTD. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DAITO, HIROSHI, HORI, KAZUNORI, KARAKAMA, YOSHIAKIRA, NAKAJIMA, HIROYASU, SAITOH, YOKUO, TAKEUCHI, YOSHINORI, TOKUYAMA, MIKIO, UMAKOSHI, YUKIMORI, YAMAGUCHI, YUZO
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Publication of US4922356A publication Critical patent/US4922356A/en
Assigned to HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. reassignment HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HITACHI, LTD.
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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/20—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
    • G11B21/21—Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier with provision for maintaining desired spacing of head from record carrier, e.g. fluid-dynamic spacing, slider
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/16—Supporting the heads; Supporting the sockets for plug-in heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following

Definitions

  • the present invention relates to a transducer supporting apparatus for a rotary memory, and particularly to a transducer supporting apparatus which is suitable for a high-density memory wherein the transducer floatation amount is small and the search speed thereof is high.
  • a rotary memory is provided with a rotating storage medium, a transducer for reading and writing information in the state of being floated above the storage medium, a transducer supporting apparatus such as the one disclosed, for example, in U.S. Pat. No. 4,167,765, for supporting the transducer, and an access mechanism for giving the transducer access to the storage medium and for supporting it at any desired position within the radius thereof.
  • the transducer supporting apparatus is provided with a flexible structural support comprising a rectangular notch which forms two outer flexible fingers connected by means of a slightly-flexible transverse frame, a flexible central tongue which extends from the transverse frame to the notch, a rigid structural support for supporting the flexible structural support comprising an elastic portion and a load beam portion, and a projection for transmitting load interposed between the rigid structural support and the central tongue of the flexible structural support, the air bearing slider (referred to as "slider” hereinafter) loaded with the transducer being provided on the central tongue.
  • the air bearing slider referred to as "slider” hereinafter
  • the transverse frame is formed into a solid form and the central tongue is substantially rigid because the slider is provided on the lower surface thereof and, consequently, the outer flexible fingers are the only substantially flexible portions of the flexible structural support.
  • the outer flexible fingers are formed in parallel with the central tongue and thus in parallel with the plane formed by the floating surfaces of the slider.
  • a radial driving force is applied to the transducer supporting apparatus from the access mechanism.
  • This driving force effects acceleration, speed maintenance, or deceleration of the transducer supporting apparatus.
  • insufficient account has been taken of the phenomenon whereby when the driving force is applied, the slider rolls and thus reduces the floatation amount, as described below.
  • the moment M G is in balance with a restoring moment M r which is produced by inclination of the slider by an angle i brought about by a change ⁇ h in the floatation amount of the floating surfaces of the slider, and thus
  • m denotes the mass of the slider
  • ⁇ denotes the search acceleration
  • l 2 denotes the distance between the left and the right floating surfaces of the slider.
  • a flexible structural support on which a slider is provided is so configurated that the rigid structural support connection end of a substantially flexible portion thereof is brought near the plane which is formed by the floating surface of the slider relative to the slider-mounting portion end thereof.
  • a bending moment and a shear force act on the flexible portion of the flexible structural support by the search acceleration or search deceleration during a search.
  • a change in floatation amount caused by any inclination of the flexible portion produced by this shear force functions in such a way that there is a decrease in the amount of reduction in the floatation amount caused by any inclination of the flexible portion generated by the angular moment.
  • the overall reduction in the floatation amount of the slider is decreased during the search.
  • FIG. 1 is a side view of an embodiment of the transducer supporting apparatus of the present invention
  • FIG. 2 is an enlarged side view of a principal portion of the apparatus shown in FIG. 1;
  • FIG. 3 is a plan view explaining in detail the flexible structural support of the apparatus in FIG. 1;
  • FIG. 4 is an explanatory view of the operation of the embodiment of the present invention shown in FIG. 1;
  • FIG. 5 is an enlarged side view of a principal portion of another embodiment of the transducer supporting apparatus of the present invention.
  • FIG. 6 is a drawing illustrating the effect of the present invention.
  • FIG. 7 is a perspective view showing a disk storage unit in which the transducer supporting apparatus is integrated.
  • FIGS. 1 and 2 show a preferred embodiment of the present invention.
  • a rigid structural support 1 made of a single piece of stainless sheet comprises, for example, an elastic portion 2 and a load beam portion 3 which ranges with the elastic portion 2 and is provided with a flange 5 as a load beam bending portion.
  • the rigid structural support is integrally formed, for example, by press working and is fixed to a guide arm 6, which is a kind of rigid arm connected to an access mechanism (not shown), at a connection portion 4 disposed at one end of the elastic portion 2 by means of a screw 7 or welding.
  • FIG. 3 is a plane view of an embodiment of the flexible structural support 11.
  • the flexible structural support 11 is provided with a junction portion 12 which serves to provide a junction with the rigid structural support 1, two flexible fingers 13 which extend from this junction portion 12 on the same plane and in the opposite direction to that of the guide arm 6, a transverse frame 15 which connects the extending ends of the two flexible fingers 13 through a step 14, and a slider mounting portion 16 in the form of a tongue which is provided near the two flexible fingers 13 and which extends from the transverse frame 15.
  • These are formed, for example, by etching a single piece of stainless sheet and the step 14 is formed by press working.
  • This slider-mounting portion 16 is brought nearer the side of the storage medium 17 by providing the step 14.
  • a slider 20 which is loaded with a transducer 18, has two floating surfaces 19, and a transducer loading means is fixed to the above-described transducer-mounting portion 16 by means of an epoxy resin adhesive.
  • the slider 20 Since the slider 20 has the floating surfaces 19 opposing to the storage medium 17, it is floated by virtue of the bearing function of the air film which is formed between the rotating storage medium 17 and the floating surfaces 19.
  • the floatation amount i.e. the space between the slider 20 and the storage medium 17, is as small as 0.2 ⁇ m to 0.3 ⁇ m.
  • the above-described floatation amount sometimes becomes, in the worst case, about 0.05 ⁇ m to 0.15 ⁇ m.
  • a projection for transmitting load 21 is adapted to transmit a load force from the free end of the rigid structural support 1 to the slider-mounting portion 16. Either one of the opposed surfaces of the slider-mounting portion 16 and the free end of the rigid structural support 1 is provided with this projection 21.
  • the projection for loads 21 is formed in a recess provided in the slider-mounting portion 16.
  • FIG. 2 is a side view showing in detail the correlation between the slider 20 and rigid structural support 1 and the flexible structural support 11 of the load beam 3 in the state of being mounted on a rotary memory.
  • flexible finger 13 on the side of the junction portion 12 with the rigid structural support is nearer the plane formed by the floating surface 19 than an end C on the side of the slider-mounting portion thereof.
  • an angle ⁇ formed by the flexible finger 13 and the plane formed by the floating surface 19 is made negative.
  • an angle ⁇ formed by the load beam 3 and the plane formed by the floating surfaces 19 is even more negative than the above-described angle ⁇ , as shown in the drawing.
  • FIG. 4 is a drawing explaining the operation of this embodiment which shows parameters relative to the side view of the slider 20, the flexible structural support 11, and the rigid structural support 1.
  • the operation during the search operation by the transducer supporting apparatus at an acceleration rate ⁇ in the radial direction shown in the drawing by the arrow 23 will be now described.
  • the only substantially flexible portion which is deformed by the inertial force F is the flexible fingers 13 having a length l G from a point B to a point C.
  • the point B may be considered as the welding point nearest the projection for loads 21 among the welding points 24 on the load beam 3 of the rigid structural support 1 and on the junction portion 12 of the flexible structural support 11, which the point C may be considered as the edge of the flexible fingers 13 on the side of the step 14. The deformation of the flexible finger 13 will now be determined.
  • the force being applied on the flexible fingers 13 comprises a shear force F S and a bending moment M G which are respectively shown by the formulas (8) and (9), and an inclination i c of the flexible finger 13 at the point C may thus be as shown by the formula (10).
  • i s denotes the inclination of the flexible finger 13 brought about by the shear force F S at the point C
  • i m denotes the inclination of the flexible finger 13 caused by the bending moment M G at the point C.
  • i denotes the inclination in the rolling direction of the slider 20 when an initial minimum flotation amount h of the floating surface 19 of the slider 20 is changed by ⁇ h by virtue of the movement of the transducer supporting apparatus at the acceleration ⁇
  • k denotes the restoring spring constant of the air bearing function.
  • any reduction in flotation amount ⁇ h produced by the search may be expressed by the formula (14).
  • E, I G , and ⁇ are respectively the Young's modulus of longitudinal elasticity of the flexible finger 13, the moment of inertia of the cross section thereof, and the angle formed by the flexible finger 13 and the plane formed by the floating surface 19 of the slider.
  • ⁇ h may be expressed approximately by the formula (16): ##EQU4##
  • the point B is nearer the plane formed by the floating surface 19 of the slider 20 than the point C so that the deformation i s produced by the shear force cancels the deformation i m by the moment.
  • the point B is nearer the plane formed by the floating surface 19 of the slider 20 than the point C so that the above-described angle ⁇ is ⁇ 0. Therefore, ⁇ h s is negative and cancels ⁇ h m and, thus, it is possible to obtain the effect of a decrease of ⁇ h.
  • This effect means that it is possible to decrease the possibility of contact between the slider 20 and the storage medium 17 and to obtain a memory with high reliability.
  • FIG. 5 is a side view of a principal portion of another embodiment of the present invention.
  • a flexible structural support 11 is fixedly provided on the end of a load beam 3 of a rigid structural support 1, i.e. the free end of the rigid structural support 1, by welding.
  • This flexible structural support 11 has a similar structure to that of the embodiment described in FIGS. 1 to 4, but the welding position of a junction portion 12 is at the top of the load beam 3.
  • Two flexible fingers 13 are so disposed that they extend from this junction portion 12 toward a guide arm 6 (not shown).
  • a projection for loads 21 is adapted to transmit a load force from the rigid structural support 1 to a slider-mounting portion 16.
  • the force from the access mechanism is transmitted via a connection portion 4 and the rigid structural support 1 to the above-described junction portion 12 at the top of the load beam 3.
  • This consideration also can result in an end B of the flexible finger 13 on the side of the junction portion 12 being nearer the plane formed by the floating surfaces 19 of the slider 20 than an end C of the flexible finger 13 on the side of a slider-mounting portion 16, whereby it is possible to obtain a similar effect to that of the embodiment shown in FIGS. 1 to 4.
  • Such a support structure as shown in FIG. 5 may be applied to a structure in which the rigid structural support 1 is inclined with respect to a storage medium from the connection portion 4 through to the free end at the top.
  • the only substantially flexible portion of the flexible structural support 11 is the flexible fingers 13 and the points B and C are thus located at both ends of the flexible fingers 13.
  • the flexible fingers 13 are so configurated that the cross sectional dimension of the flexible fingers on the side of the junction portion 12 becomes smaller than that on the side of the step 14, the only substantially flexible portion even in the flexible fingers 13 is a portion having a small cross sectional dimension.
  • this portion having a small cross sectional dimension is curved upwardly relative to the slider-mounting portion 16
  • the above-described point B lies at the point where the upward curve starts and can be made nearer to the plane formed by the floating surface 19 of the slider 20 than the point C.
  • angles ⁇ and ⁇ are made negative and conform to the inequality ⁇ , they may be the same. However, it is important that they may be made negative, as mentioned in the above-described definition.
  • angles ⁇ and ⁇ are angles with respect to the plane formed by the floating surfaces 19 of the slider 20.
  • the plane formed by the slider-mounting portion 16 of the flexible structural support 11 is substantially parallel with the plane formed by the floating surfaces 19 of the slider 20, they may be considered as an angle with respect to the slider-mounting portion 16.
  • the search includes driving forces effecting acceleration, speed maintenance, or deceleration of the transducer supporting apparatus and although the above description references the acceleration portion of the search, it is also applicable to the deceleration portion of the search.
  • a high density disk storage unit having a floatation amount, i.e. a space between the slider 20 and the storage medium 17, of 0.37 ⁇ m is described below as an example.
  • the meaning of the above-described floatation amount is considered from the viewpoints of the vibration and the manufacturing tolerance in regard to the slider and of the surface coarseness and the longitudinal movement of the disk storage unit which is the storage medium.
  • This floatation amount is obtained by averaging the time average values of the minimum spaces between the sliders and the disk for a great number of sliders produced in large amounts.
  • the minimum value of the instantaneous floatation amount for a particular slider to be actually used will become smaller than the above average value of the floatation amount due to manufacturing errors occurring with each of many sliders, assembly tolerance, and various external forces which acts on a transducer supporting system when it is driven.
  • the phenomenon of depression of floatation amount during search which is the object of the present invention is also caused by a force acting in the search direction which is one of the external forces acting on the transducer supporting system.
  • the minimum instantaneous floatation amount of a slider may become about 0.2 to 0.3 ⁇ m due to causes other than the external forces acting in the search direction, as described above.
  • the magnetic disk has surface deformations and surface coarseness produced during assembly, whereby the floatation amount is decreased and it may become as small as about 0.05 to 0.15 ⁇ m in the worst case even if depression due to the external forces acting in the search direction is disregarded.
  • a memory is required to rapidly respond to a read/write command from the system.
  • FIG. 6 shows the relationship between the search time (ms) and the reduction in the floatation amount ⁇ h( ⁇ m) produced by the search, which is obtained from the formulas (16) and (19), using the angle ⁇ formed by the flexible finger of the flexible structural support and the plane formed by the floating surface as a parameter.
  • the axis of abscissa is the search time t(ms) and the axis of ordinate is the reduction in the floatation amount ⁇ h( ⁇ m).
  • the search time is an important factor for its qualities and it is demanded for qualities that the search time is reduced just only by 1 ms.
  • the allowance of the space between the slider and the magnetic disk is about 0.05 to 0.15 ⁇ m, as described above.
  • the search time is required to be 16.3 ms or more in order that ⁇ h does not become larger than 0.03 ⁇ m in the case of ⁇ 0°.
  • FIG. 7 is a drawing showing a disk storage unit in which the transducer supporting apparatus of the present invention is integrated.
  • the disk storage unit is provided with magnetic disks 17 having a rotating disk form and the access mechanism 32 for giving the transducer a search motion so that information is written in the desired track on the magnetic disk and written information is read therefrom, they being arranged on a base 33.
  • a plurality of the above-described magnetic disks 17 are fixed to a rotational spindle 34, for example, at distances of about 5 to 8 mm.
  • the access mechanism 32 comprises a plurality of guide arms 6 supported by a shaft 35 in such a manner that they can swing and a voice coil motor 37 for swing the guide arms 6.
  • the guide arms 6 are so provided as to correspond to the magnetic disks 17 and the transducer supporting apparatus 38 of the present invention is bonded to the top end of the arms.
  • the guide arms 6 are swinged along the disk surfaces of the magnetic disks 17 by driving the above-described voice coil motor 37. Consequently, the transducer supporting apparatus provided with the slider 20 loaded with a transducer at its top is inserted between the magnetic disks 17.
  • the transducer writes and reads information while the slider 20 loaded with the transducer floats at a small distance of 0.2 to 0.3 ⁇ m relative to the magnetic disks 17 which rotate at a peripheral speed of 40 to 60 m/s.
  • the transducer supporting apparatus 38 is provided with the rigid structural support 1 which is fixed to a guide arm 6 and the flexible structural support 11 connected to the free end of the rigid structural support 1.
  • the flexible structural support 11 is so configurated that the end B on the side of the junction portion 12 of the flexible finger 13 is brought nearer the plane formed by the floating surface 19 of the slider 20 than the end C on the side of the slider-mounting portion and the angle ⁇ formed by the flexible fingers and the plane formed by the floating surface 19 is made negative.
  • the angle is preferably -2.0° ⁇ 0°, and particularly -1.5° ⁇ -0.5° from the viewpoint mentioned above.
  • the magnetic disks may be integrated at distances of about 5 to 8 mm which is employed in a high-density disk storage unit.

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  • Supporting Of Heads In Record-Carrier Devices (AREA)
US07/008,259 1986-01-29 1987-01-29 Transducer supporting apparatus and disk storage unit Expired - Lifetime US4922356A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1568186 1986-01-29
JP61-15681 1986-01-29

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US4922356A true US4922356A (en) 1990-05-01

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US07/008,259 Expired - Lifetime US4922356A (en) 1986-01-29 1987-01-29 Transducer supporting apparatus and disk storage unit

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US (1) US4922356A (enrdf_load_stackoverflow)
JP (1) JP2533512B2 (enrdf_load_stackoverflow)
KR (1) KR900007172B1 (enrdf_load_stackoverflow)
CN (1) CN1006025B (enrdf_load_stackoverflow)
DE (1) DE3702360A1 (enrdf_load_stackoverflow)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5019931A (en) * 1988-09-28 1991-05-28 Fujitsu Limited Mechanism for suspending a head slider of a recording apparatus
US5142424A (en) * 1989-07-12 1992-08-25 Yotaro Hatamura Floatable information-reading head support configured to prevent forward pitch
US5196975A (en) * 1990-10-30 1993-03-23 Teac Corporation Magnetic disk apparatus having head arm elastically supported on head carriage
US5237475A (en) * 1989-12-26 1993-08-17 Alps Electric Co., Ltd. Magnetic head for photo-magnetic recording
US5243482A (en) * 1989-10-20 1993-09-07 Hitachi, Ltd. Floating type magnetic head supporting assembly including a coupling to a slider side surface
US5383073A (en) * 1991-07-23 1995-01-17 Hitachi, Ltd. Magnetic head supporting apparatus having a fulcrum point of load support offset from a slider center in an air upstream direction
US5473485A (en) * 1992-03-06 1995-12-05 Read-Rite Corporation Tripad air bearing magnetic head slider
US5825589A (en) * 1991-04-17 1998-10-20 Quantum Corporation Low stiffness apparatus for supporting a read/write transducer head slider
US5838517A (en) * 1995-12-01 1998-11-17 International Business Machines Corporation Shock protected high stack density suspension system
US5877920A (en) * 1996-07-10 1999-03-02 Seagate Technology, Inc. Head suspension assembly with displacement limiter
US5880900A (en) * 1995-12-19 1999-03-09 International Business Machines Corporation Error recovery method and disk drive apparatus to superimpose a vibration signal with one-half frequency onto a driving signal to a magnetoresistive head
US5912788A (en) * 1990-11-09 1999-06-15 Hutchinson Technology Inc. Flexure region for one-piece flexure-load beam structure
US5930079A (en) * 1996-08-21 1999-07-27 Magnecomp Corp. Suspension having limited travel flexure for improved loadability
US5970037A (en) * 1992-06-08 1999-10-19 Asahi Kogaku Kogyo Kabushiki Kaisha Magneto-optical disk apparatus
US6229677B1 (en) 1993-11-12 2001-05-08 Seagate Technology Llc Disc drive actuator arm assembly with outer arm z-height less than inner arm z-height
US20040184193A1 (en) * 2002-07-25 2004-09-23 Tdk Corporation Magnetic head apparatus, magnetic head supporting mechanism and magnetic recording apparatus
US6831814B2 (en) * 1998-07-24 2004-12-14 Sae Magnetics (H.K.) Ltd. Flexure design providing improved lift-off in a disk drive
US20060050441A1 (en) * 2004-09-09 2006-03-09 Samsung Electronics Co., Ltd. Recording and/or reproducing apparatus suspension assembly and method
US20070086115A1 (en) * 2005-10-14 2007-04-19 Seagate Technology Llc Suspension tongue design for varying the static pitch and roll torque on the slider of a disk drive
US20120287536A1 (en) * 2011-05-11 2012-11-15 Tdk Corporation Head support mechanism

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
JP4101492B2 (ja) * 2000-10-23 2008-06-18 松下電器産業株式会社 ヘッド支持機構
US7701672B2 (en) * 2006-06-16 2010-04-20 Sae Magnetics (Hk) Ltd. Suspension with locally stiffened load beam
US8254063B2 (en) * 2010-10-22 2012-08-28 Seagate Technology Llc Slider for a head gimbal assembly with an inverted dimple

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JPS5050777A (enrdf_load_stackoverflow) * 1973-08-17 1975-05-07
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US4167765A (en) * 1978-07-27 1979-09-11 International Business Machines Corporation Transducer suspension mount apparatus
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Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5019931A (en) * 1988-09-28 1991-05-28 Fujitsu Limited Mechanism for suspending a head slider of a recording apparatus
US5142424A (en) * 1989-07-12 1992-08-25 Yotaro Hatamura Floatable information-reading head support configured to prevent forward pitch
US5243482A (en) * 1989-10-20 1993-09-07 Hitachi, Ltd. Floating type magnetic head supporting assembly including a coupling to a slider side surface
US5237475A (en) * 1989-12-26 1993-08-17 Alps Electric Co., Ltd. Magnetic head for photo-magnetic recording
US5196975A (en) * 1990-10-30 1993-03-23 Teac Corporation Magnetic disk apparatus having head arm elastically supported on head carriage
US5912788A (en) * 1990-11-09 1999-06-15 Hutchinson Technology Inc. Flexure region for one-piece flexure-load beam structure
US6373662B1 (en) 1990-11-09 2002-04-16 Hutchinson Technology Incorporated Partially etched flexure arms in an integrated gimbal suspension
US5825589A (en) * 1991-04-17 1998-10-20 Quantum Corporation Low stiffness apparatus for supporting a read/write transducer head slider
US5383073A (en) * 1991-07-23 1995-01-17 Hitachi, Ltd. Magnetic head supporting apparatus having a fulcrum point of load support offset from a slider center in an air upstream direction
US5473485A (en) * 1992-03-06 1995-12-05 Read-Rite Corporation Tripad air bearing magnetic head slider
US5970037A (en) * 1992-06-08 1999-10-19 Asahi Kogaku Kogyo Kabushiki Kaisha Magneto-optical disk apparatus
US6229677B1 (en) 1993-11-12 2001-05-08 Seagate Technology Llc Disc drive actuator arm assembly with outer arm z-height less than inner arm z-height
US5838517A (en) * 1995-12-01 1998-11-17 International Business Machines Corporation Shock protected high stack density suspension system
US6069773A (en) * 1995-12-01 2000-05-30 International Business Machines Corporation Shock protected high stack density suspension system
US5880900A (en) * 1995-12-19 1999-03-09 International Business Machines Corporation Error recovery method and disk drive apparatus to superimpose a vibration signal with one-half frequency onto a driving signal to a magnetoresistive head
US5877920A (en) * 1996-07-10 1999-03-02 Seagate Technology, Inc. Head suspension assembly with displacement limiter
US5930079A (en) * 1996-08-21 1999-07-27 Magnecomp Corp. Suspension having limited travel flexure for improved loadability
US6831814B2 (en) * 1998-07-24 2004-12-14 Sae Magnetics (H.K.) Ltd. Flexure design providing improved lift-off in a disk drive
US20040184193A1 (en) * 2002-07-25 2004-09-23 Tdk Corporation Magnetic head apparatus, magnetic head supporting mechanism and magnetic recording apparatus
US20060050441A1 (en) * 2004-09-09 2006-03-09 Samsung Electronics Co., Ltd. Recording and/or reproducing apparatus suspension assembly and method
US20070086115A1 (en) * 2005-10-14 2007-04-19 Seagate Technology Llc Suspension tongue design for varying the static pitch and roll torque on the slider of a disk drive
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Also Published As

Publication number Publication date
KR870007504A (ko) 1987-08-19
CN1006025B (zh) 1989-12-06
JPS62256280A (ja) 1987-11-07
JP2533512B2 (ja) 1996-09-11
DE3702360A1 (de) 1987-07-30
DE3702360C2 (enrdf_load_stackoverflow) 1990-04-12
CN87101767A (zh) 1987-09-30
KR900007172B1 (ko) 1990-09-29

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